${\sigma _1}$ and ${\sigma _2}$ are the electrical conductivities of $Ge $ and $Na$ respectively. If these substances are heated, then
Easy
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1$A$ potentiometer wire has length $10\, m$ and resistance $10\,\Omega$ . It is connected to a battery of $EMF$ $11\, volt$ and internal resistance $1\, \Omega$ , then the potential gradient in the wire is ............... $V/m$View Solution
- 2You are given a resistance wire of length $50\, cm$ and a battery of negligible resistance. In which of the following cases is largest amount of heat generatedView Solution
- 3Calculate the potential difference between, points $A$ and $B$ and current flowing in $10\,\Omega $ resistor in the part of network belowView Solution
- 4In the circuit shown in figure, the power which is dissipated as heat in the $6\,\Omega $ resistor is $6\,W$. What is the value of resistance $R$ in the circuit? ................ $\Omega$View Solution
- 5A uniform wire of resistance $9\, ohm$ is bent in the form of a circle. The effective resistance across the points $A$ and $B$ is ............... $\Omega$View Solution
- 6An expression for rate of heat generated, if a current of $I$ ampere flows through a resistance of $R$ $\Omega$, isView Solution
- 7In the given circuit ' $a$ ' is an arbitrary constant. The value of $m$ for which the equivalent circuit resistance is minimum, will be $\sqrt{\frac{ x }{2}}$. The value of $x$ is ...........View Solution
- 8Match the List $I$ with the List $II$ from the combination shown. In the left side (List $I$) there are four different conditions and in the right side (List $II$), there are ratios of heat produced in each resistance for each condition :View Solution
List $I$ List $II$ $(I)$ Two wires of same resistance are connected in series and same current is passed through them $(A)$ $1:2$ $(II)$ Two wires of resistance $R$ and $2R$ $ohm$ are connected in series and same $P . D .$ is applied across them $(B)$ $4:1$ $(III)$ Two wires of same resistance are connected in parallel and same current is flowing through them $(C)$ $1:1$ $(IV)$ Two wires of resistances in the ratio $1: 2$ are connected in parallel and same $P . D .$ is applied across the $(D)$ $2:1$ - 9Two cells when connected in series are balanced on $8\;m$ on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on $2\,m$. The ratio of $e.m.f.$'s of the two cells isView Solution
- 10The effective resistance of the network between points $A$ and $B$ isView Solution
